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You searched for: mediatype:audio AND collection:audio_tech AND subject:"Geobiology"
[audio]Oxygen, the Menace -- Groks Science Show 2013-02-13 - Charles Lee and Frank Ling
Our current biosphere depends on oxygen to live but that was not always true. On this show, Joe Kirschvink joins us to talk about the vicousness of oxygen, the evolution of cyanobacteria, and the Medea hypothesis.
Keywords: pre-historic earth; geobiology; cyanobacteria; photosynthesis
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